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Adds on Firefox start up

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Past few times now every single time i boot up my PC, Firefox instantly opens itself and immidietly redirects me to a add. It's been casinos etc, i've disabled my addons just in case that is what was causing the issue also i do not have Firefox set to instantly open on PC start up either yet it does for some reason.

Past few times now every single time i boot up my PC, Firefox instantly opens itself and immidietly redirects me to a add. It's been casinos etc, i've disabled my addons just in case that is what was causing the issue also i do not have Firefox set to instantly open on PC start up either yet it does for some reason.
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sampapa12, I wonder if something at system start-up is opening a link? So it is not Firefox itself that is starting as such, but something is opening a link at start-up and it is being opened in Firefox as that is your default browser?

I would first run a full system malware scan in case these ads are being triggered by a piece of malware.

If the scan finds nothing then Something else you could try is to check your OS start-up items and see if there is anything there that you do not recognise or that might launch an ad at system start-up.

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